Focus on simply making the opponent play, prepare low, adapt to services coming off the glass by anticipating or pivoting, use the opponent's pace, and aim the return to the server's feet.
This explanation is quite helpful for understanding the mindset of returning serves in padel. The coach makes a strong point about the main goal being simply getting the ball back in play. Learning how to handle returns off the side glass is crucial as serves often go there. They also give practical advice on using the opponent's pace and targeting the right spot.